package com.lionel.atomic;
import lombok.extern.slf4j.Slf4j;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Semaphore;
import java.util.concurrent.atomic.LongAdder;
/**
 * @author 714936489@qq.com
 * @date 2018/5/14 22:36
 */
@Slf4j
public class AtomicExample3 {
    private static int clientTotal = 5000;
    private static int threadTotal = 200;
    private static LongAdder count = new LongAdder();
    public static void main(String[] args) throws Exception {
        final ExecutorService executorService = Executors.newCachedThreadPool();
        final Semaphore semaphore = new Semaphore(threadTotal);
        CountDownLatch countDownLatch = new CountDownLatch(clientTotal);
        for (int i = 0;i<clientTotal;i++){
            executorService.execute(()->{
                try {
                    semaphore.acquire();
                    add();
                    semaphore.release();
                } catch (Exception e) {
                    log.error("exception",e);
                }
                countDownLatch.countDown();
            });
        }
        countDownLatch.await();
        executorService.shutdown();
        log.info("count:{}",count);
    }
    private static void add(){
        count.increment();
    }
}
